November 2018 1 50 Report
Suatu radioaktif mempunyai waktu paruh 12 hari. Jika unsur radioaktif tersebut disimpan selama 60 hari, maka sisa unsur radioaktif tersebut adalah.....
a. 50%
b. 25%
c. 12,5%
d. 6,25%
e. 3,12%

Tolong disertakan caranya.

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